A computer system for optimizing node and edge selections within a digital graph model accesses a digital graph model of a physical warehouse location. The digital graph model comprises information indicating a location of multiple specific items of inventory among shelves in the physical warehouse location. The computer system identifies a set of orders that each comprise one or more items and an order priority. The computer system then maps each item in each order selected from the set or orders to the multiple nodes within the digital graph model. The computer system identifies a ranking node from the multiple nodes. The computer system then traverses one or more edges that extend from the ranking node to identify a shortest path within the digital graph model to fill a digital model of a picking cart above a packing threshold level.